ADJUSTABLE CRANK SHAFT ASSEMBLY FOR A PRESS MACHINE

摘要

A device for adjusting eccentricity of a crank shaft for a press machine has a main portion (21) of the crank shaft rotatably supported by a frame; an eccentric portion (23) having an axis eccentric from that of the main portion and arranged to be coupled to a connecting member (12) of the press machine, the main portion and the eccentric portion being capable of separating from each other in the axial direction of the crank shaft; connecting means (48) provided where the main portion and the eccentric portion contact each other for connecting the main portion with variable eccentricity and drive means engaging and disengaging the connecting means.